|Author's Email Address
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|Type of Document
||Design of Dual-Band Bandpass Filter for WLAN Applications|
|Date of Defense
bandpass filter (BPF)
stub-loaded resonator (SLR)
||The rapid development for the wireless communication applications is happening in the multiple bands and filters are fundamental components extensively used in microwave and millimeter-wave circuits. Recently, the use of wireless local area network (WLAN) systems has expanded rapidly, demanding more multiband applications.|
In this thesis, a microstrip-line dual-band bandpass filter using stub-loaded resonator (SLR) is proposed. The device has good selectivity in first pass band and wide bandwidth in second pass band. By properly adjusting the gap between source-load and SLR, good return loss at lower frequencies can be achieved.
To further improve the rejection level between the first pass band and second pass band, the spur-line is etched in the coupled feeding line to produce another transmission zero at 4.3 GHz.
Based on the proposed SLR, a dual-band bandpass filter with three transmission zeros is implemented. The upper stopband extends to 10.75 GHz to have good suppression below -20dB.
||Chih-Wen Kuo - chair|
Hsin-Lung Su - co-chair
Pu-Hua Deng - co-chair
Hsing-Feng Chen - co-chair
Ken-Huang Lin - advisor
Indicate in-campus at 0 year and off-campus access at 1 year.|
|Date of Submission